You have to be very careful about restricting players from features in your game or from the game itself for external reasons. There are different response levels and appropriateness that can be met with each reason, including something that the Terms of Service disallows (discrimination, for example).
A general statement wouldn’t suffice here since, as mentioned earlier, every reason can be taken a different way. With that in mind, it would help to review each reason you might have to restrict a player from your game and make sure it doesn’t break compliance with any standing rules or doesn’t seem morally incorrect to be doing. This heavily based upon your own judgement.
Ultimately, as the game’s creator, you will be in control of moderating content and players on it as well as bearing full responsibility for inappropriate conduct (not following rules) or a mass of players abusing features (if you have a custom painting game and many inappropriate images are generated from it, as the developer, you’re responsible for not protecting against this). Keeping this in mind, you also decide what warrants a ban and moderation will intervene if an issue is raised.
I wouldn’t go so far as to restrict players from playing your game due to swearing in a Discord server. You have utilities to guard against that or alleviate the circumstances in which it happens (e.g. Dyno automatic moderation). At the very least, ban them from the server, sure, but maybe not the whole game itself since they didn’t commit any misdeeds there.
All the options you’ve listed on the thread are valid and are green. A lot of developers do this already (more of the fourth than any of the other three). I’m not saying that just because they do it it’s allowed, rather, showing you that they’re valid considerations. I don’t think anyone would or has a right to get mad at you if you ban someone for acting maliciously in your community.
A related subject, but do be aware of the upcoming PolicyService as well that’ll help to ensure compliance with laws in different regions and with various player configurations. At some point, it will become necessary and not a question of “should I” to restrict player access to features or from launching your game at all in certain regions.
WRT above, You can check out About our upcoming Global Compliance System for more information.
Cheers, happy developing.
